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Radio Engineers, Proceedings of the Institute of

Issue 2 • Date April 1924

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Displaying Results 1 - 10 of 10
  • [Front cover]

    Page(s): c1 - c2
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    Freely Available from IEEE
  • Contents

    Page(s): 111
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    Freely Available from IEEE
  • General Information

    Page(s): 111
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  • Officers and Board of Direction, 1924

    Page(s): 112
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    Freely Available from IEEE
  • Receiving Measurements and Atmospheric Disturbances at the Bureau of Standards, Washington, September and October, 1923

    Page(s): 113 - 118
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    The signal field strengths and the corresponding strengths of atmospheric disturbances are given for the Nauen and Lafayette stations for September and October, 1923. View full abstract»

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  • Short Period Variations in Radio Reception

    Page(s): 119 - 158
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    Continuous records of electric field intensity at distances of from 11 to 2,600 kilometers (6.9 to 1,650 miles) from various broadcasting stations are made by amplifying and rectifying the received current from an open antenna, and recording galvanometer deflections produced by this rectified current. These records show a complex curve containing periodicities ranging from seconds to tens of minutes, the relative amplitude of the short and long period elements varying with the distance. The transition from day to night conditions is shown, and well-marked short period variations ("fading") in night-time reception from a station only 11 kilometers (6.9 miles) distant are found. Simultaneous records at separated receiving points are found to be dissimilar, even with separations as small as 550 meters (1,680 feet), and simultaneous records of different distant stations taken at the same receiving point are also shown to be entirely unlike. A tentative hypothesis for these fluctuations is advanced by the author, in which verying local absorption plays the principal part, but with marked interference effects produced by plural path transmission. View full abstract»

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  • New Applications of the Sodion Detector

    Page(s): 159 - 175
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    Further improvements in a new type of simple detector are described and its operation shown to be the result of ionization of sodium vapor, consequent dissipation of the space charge and the increased current to the "collector" electrode secured thereby. A condition of equilibrium is obtained and is broken up by an impressed signal. On account of the inherent and controllable time element a gradual decrease in anode current for a series of input impulses is secured, resulting in a large alteration of current for impulses of low amplitude and consequently a strong response for weak signals. Power characteristics are given and possibilities indicated of the use of this device in various types of receiving circuit and also in measurement of signal strength, such as for the observations of fading View full abstract»

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  • The Characteristic Surface of the Triode

    Page(s): 177 - 191
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    The paper outlines a method of representing triode characteristics by means of surfaces rather than by families of characteristic curves. The physical features of the surfaces are then described in considerable detail and the fundamental equation for the alternating component of the plate current is derived for an ideal surface. Finally the action of the triode both as a simple and as a regenerative amplifier is described with reference to its characteristic surface. View full abstract»

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  • Formulas and Tables for the Calculation and Design of Single-Layer Coils

    Page(s): 193 - 208
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    A set of tables for the simple calculation of the inductance of single layer helical and polygonal coils and their design is given; together with full illustrations of their use. View full abstract»

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  • Digests of United States Patents relating to radio telegraphy and telephony

    Page(s): 209 - 223
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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope